.NET Developer – DevSecOps

ADP, Inc.; Herndon (VA); On-site; USD 75,000 - 90,000; Full time

Job summary

ADP, Inc. is seeking a .NET Developer – DevSecOps in Herndon, VA to design, develop, and maintain secure backend applications for a mission-critical modernization project.

You will work on backend services using .NET/C#, ASP.NET Core, EF, and SQL Server, delivering REST APIs and microservices within an Agile, secure coding environment. The role involves collaborating with frontend, architecture, testers, cybersecurity, and DevSecOps teams, ensuring automated testing, SAST/DAST, and CI/CD

Qualifications

• 3+ years of .NET/backend development experience.
• Strong experience with C#, .NET, ASP.NET Core, and Entity Framework.
• Experience developing and integrating REST APIs and backend services.
• Experience working with Microsoft SQL Server, including queries and data access.
• Proficiency with Visual Studio, Git, debugging, and troubleshooting tools.
• Familiarity with microservices and modern application development practices.
• Knowledge of DevSecOps, CI/CD pipelines, automated testing, and secure coding practices.
• Experience collaborating in an Agile software development environment.
• Ability to obtain and maintain a Public Trust Background Investigation.

Responsibilities

• Design, develop, and maintain backend applications using .NET/C#, ASP.NET Core, and EF.
• Develop RESTful APIs, microservices, and backend services.
• Write clean, scalable, efficient code following best practices.
• Design and optimize SQL Server queries and data access components.
• Collaborate with frontend, architecture, testers, and product teams.
• Maintain secure integrations with internal/external systems, incl. cloud services.
• Apply secure coding practices and DevSecOps throughout development.
• Develop and run unit, integration, API, and automated tests.
• Support CI/CD pipelines with GitLab/Jenkins and automated builds/tests.
• Participate in SAST/DAST, dependency scanning, and code reviews.
• Use Visual Studio and Git to troubleshoot backend, DB, API issues.
• Support application development in AWS cloud environments.
• Assist containerized deployment with Docker/Kubernetes/OpenShift.
• Maintain technical documentation for components, APIs, configurations.
• Participate in Agile/Scrum ceremonies and cross-functional collaboration.

Skills

C#

ASP.NET Core

REST APIs

Entity Framework

Microservices

SQL Server

Secure Coding

DevSecOps

CI/CD

Agile

Education

Bachelor's degree in IT/CS/SE

Tools

Visual Studio

Git

GitLab

Jenkins

SonarQube

Docker

Kubernetes

OpenShift

Job description

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process.

.NET Developer – DevSecOps

Full Time Herndon, VA, US

Salary Range: $75,000.00 To $90,000.00 Annually

Employment Eliglibity:Thisposition requires U.S. Citizenship to meet federal contract requirements. Candidates must be legally authorized to work in the United States without current or future employer sponsorship. This position is not eligible for visa sponsorship.
Clearance: Ability to obtain and maintain a Public Trust Background Investigation

Experience: Minimum 3 years
Education: Bachelor's degree in Information Technology, Computer Science, Software Engineering, or related field preferred
Certifications: AWS Certification and/or CompTIA Security+ preferred

Position Overview:The .NET Developer is responsible for designing, developing, and maintaining secure, scalable, and high-performing backend applications supporting a mission-critical application modernization project. This role focuses on backend development using Microsoft .NET/C#, ASP.NET Core, Entity Framework, SQL Server, REST APIs, and microservices architecture.

The .NET Developer collaborates with frontend developers, solution architects, testers, cybersecurity, and DevSecOps teams to deliver reliable application services while incorporating Agile, secure coding, automated testing, and CI/CD practices throughout the software development lifecycle.

Key Responsibilities:

• Design, develop, enhance, and maintain backend applications and services using Microsoft .NET/C#, ASP.NET Core, and Entity Framework.
• Develop and integrate RESTful APIs, microservices, and backend services to support application functionality and system integrations.
• Write clean, scalable, efficient, reusable, and maintainable code following established coding standards and software engineering best practices.
• Design and optimize Microsoft SQL Server database queries, data access components, and application performance.
• Collaborate with frontend developers, UI/UX designers, solution architects, testers, and product teams to define and implement software requirements.
• Develop and maintain secure integrations with internal and external systems, including cloud-based services and enterprise applications.
• Apply secure coding practices, OWASP guidelines, and DevSecOps principles throughout backend development.
• Develop and execute unit, integration, API, and automated tests to ensure application functionality, reliability, and quality.
• Support CI/CD pipelines using GitLab, Jenkins, or equivalent tools, including automated builds, testing, and deployments.
• Participate in SAST/DAST security scanning, dependency vulnerability assessments, code-quality reviews, and remediation activities.
• Use Visual Studio, Git, and approved debugging tools to troubleshoot backend application, database, API, and integration issues.
• Support application development, deployment, and troubleshooting within AWS cloud environments.
• Support containerized application development and deployment using Docker, Kubernetes, OpenShift, or equivalent technologies.
• Maintain technical documentation for application components, APIs, configurations, and development activities.
• Participate in Agile/Scrum ceremonies, including sprint planning, daily standups, backlog refinement, reviews, and retrospectives.
• Collaborate with cross-functional teams to improve application security, performance, scalability, reliability, and maintainability.

Required Qualifications:

• Minimum 3 years of .NET/backend application development experience.
• Strong experience with C#, Microsoft .NET, ASP.NET Core, and Entity Framework.
• Experience developing and integrating REST APIs and backend application services.
• Experience working with Microsoft SQL Server, including database queries and data access.
• Proficiency with Visual Studio, Git, debugging, and troubleshooting tools.
• Familiarity with microservices architecture and modern application development practices.
• Working knowledge of DevSecOps, CI/CD pipelines, automated testing, and secure coding practices.
• Experience collaborating with cross-functional teams in an Agile software development environment.
• Strong analytical, troubleshooting, communication, and problem-solving skills.
• Ability to obtain and maintain a Public Trust Background Investigation.

Preferred Qualifications:

• Bachelor's degree in Information Technology, Computer Science, Software Engineering, or a related field from an accredited institution.
• Experience with AWS cloud services and cloud-based .NET application development.
• AWS Certification and/or CompTIA Security+ certification.
• Experience with microservices architecture, distributed systems, and cloud-native application development.
• Familiarity with GitLab, Jenkins, SonarQube, Docker, Kubernetes, or OpenShift.
• Experience with SAST/DAST, automated security scanning, and DevSecOps CI/CD pipelines.
• Knowledge of NIST SP 800-53, FedRAMP, ATO, and federal application security requirements.
• Experience supporting federal government, law enforcement, case management, or other mission-critical applications.

Equal Opportunity Employer: We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.